Spring-retarding device.



E. V. HARTFORD.

SPRING RETARDING DEVICE.

APPLICATION FILED 1320.26, 1906.

Lg. Patented Feb. 16, 1915.

iunrnnierarueraunnm ernten.

:EDWARD "17. IERTFORD, 0F NEW' YORK, N. Y.

SPElNG-RETARDING DEVICE.

maaien.,

Specification of Letters Patent.

Patented Feb. 16, 1215.

Application led December 26, 1906. Serial No. 349,469.

lalthough it may be 'applied as well to other types of spring-supported vehicles.

The object of my invention is to provide an improved friction joint for use in such devices which may be `used to advantage in attaching the varms thereof to... the running gear and body portion respectivelyV of the vehicle, or it may be used for creating friction in the principal friction joint of the\de` vice.

In the accompanying drawing Figure 1 illustrates a sideelevation of the device, wherein my -improved friction joints are shown at the outer'ends of the upper and lower arms. Fig. 2 is a central, vertical section of the joint attached to the upper arm in Fig. 1. Fig. 3 is a similar' -view ofthe jointfattachedto the lower arm, and Fig; 4 is a similar view of the central friction joint. j j i 'llhe form of device in connection withV which 1 have illustrated my invention is that wherein a central friction joint is used, employing a central friction disk v 1, and outer friction ydisks 2, 3, which are mounted to rotate upon a connecting stud or bolt 4,

:having an enlarged head 38, whichfis pinned y" to the disk. 3 at` 5. The stud carries a bushing 6, shown pinned to it at 7, Between the g inner, friction disk 1,'and the outer friction i disks 2 and 3, are washers 8:, 9, composed of leather, etc. upon the said bushing by threaded'nut which engages a thread onthe outer Aend'of bolt 4 and bears against washery 11, which, in turn, engages the convex body of aspring spider 12, the feet of which-press lagainst the outer disk 2. Disks 1 and 2 and friction washers 8 and 9 have lateral play'on bushing 6, and the tightening ofthe nut -10 will adjust the pressure upon the parts and the tice be hardened.

consequent friction, and this is maintained against wear bythe spring spider 12. A band 13 encircles the parts. Central friction disk 1 is formed integral with, or otherwise rigidly attached to upwardly project-V ing arm 14, and the outer friction disks 2 and are similarly attached to downwardly projecting arms 15, 16. The arms. as it were, are thus fri'ctionally connected. There is a two-part arm 15' and 16, and a one-part arm 14. A

The above-named parts are described here .for clearness and understanding of the device, and no claim is here made to such construction in itself, but my resent invention resides in the parts `)flow to e described, and use thereof in combination with additional friction means.

'llhe tail pieces or means for attaching the one-part arm 14 and the two-part arm 15, 16, to the bodj7 portion and running gear respectively df the vehicle are shown the same in all/essential particulars, ,y differing only in minor details, due to the fact that there is but one member to the arm 14, whileV two members or parts 15, 16, constitute the other arm. 1 will first describe such tail piece shown herein as applied to arm 14.

r'llhis consists of a stud 17, which is adapted to pass through the vehicle, body and 'to be secured. thereto by some suitable means, as byriveting, and for this purpose is .equipped with a shoulder/ 18, to enable it to fit Hush against the body. Upon this stud is mounted a bushing 19, which is /pinnedto the said stud at 20, so as to be Xed thereto. The bushing may in prac- A disk21 is formed integra/l with or otherwise securely attached to arm vv14, and has a-central opening which fits bushing 19,' and permits the said disk to rotate thereon. Attached to the said disk .21 pin 22 are two lfiat washers 23, 24,

f friction material, such as'vulcanized iibenf" ,substantially form part of and are an eX`A The'parts are heldin placey which may be made of steel, and are designed to rotate in unison with disk 21, and

tension of said disk.` These parts constitute the central friction member of the friction connection between the vehicle part and the single member arm 14.

Formed integral with Stud 17 is niet@ disk ,25, having a projecting peripheral in the bushing 19. By means of the said p in and vslot connection, v.said recessed disk 27 is fixed on the said bushing against r0- tary movement, but is permitted to have a lateral or sliding movement thereon. Disk 2 7- has a peripheral flange o r ledge 30 similar to that on disk 25, forming an annular recess on the inner face of the said disk.

Between the washer 23'and lrecessed disk 27 and the washer 24 and recessed disk 25,

are contained fiat washers 31, 32 of friction material, which are received-and partly inclosed by the recesses in disks 27, 25. These,

, 'washers may be of any suitable 'material,

such as vulcanized fiber, leather, etc., and

furnish the friction desired.

` The outer e'nd of stud 17 is threaded and receives'a threaded nut 33.l Said nut has aslit at 3 4, `.formed by a saw kerf or in any other suitable manner, by which said nut is` compressed previous to application,`

and which being expanded" in applying it to the stud, constitutes an 'effective lock.

It will be perceived that disks and 27 are held against-rotary movement relative to the stud,l Whereas disk 21 and, its attached f Adisk-sftp"I washers'23, 24, are permitted to ro` Etate thereon, thereby causmg the washers 31,

tionvwashers 31 and'32may becompressedl 32, t' exert Ifriction upon the, disksbetween which A`they are interposedglikewise that the said disks 21,y 23, 24, and,27,and.the fricupon tightening -thenut 33 against the resistance of diskf25, whereby the pressure may be adjusted and wear compensated for. This nut is made large enough to engage a -substantialpart of the disk 27,-applying pressure thereto over the larger part of its area, thereby 4insuring even pressure .on the friction washer and preventing any buckling or warping of said disk. Recessed disk, 27 being fixed against rotary movement, insures against an undesi'r'edloosening of the nut 33 in the operation of the device.

The method of attaching the two-part or -member arm 15, 16, (the lower arm in the present illustration) to the running gear plates 23, 24 of Fig. 2 are omittedand in f their place there is situated between the friction disks 35, 36, vwhich are connectedpto the arm parts 15, 16, a central washer 37, which spaces the arm parts A'15, 16, apart, and which may be free upon the bushing 19. Ilates 23 and 24 are employed for the purpose of maintaining the arm 14 in proper vertical position, so that it shall, in descendout interfering with either of them, and

plate 37 is situated between the disks 35 and 36, so as to space arm-'parts 15 and v16 apart to receive arm 14. The peripheral ianges 26 and 30 assist in maintaining the friction washers 31, 32 in shape and position, and in addition exclude dust, Water, etc. If desired, these peripheral ianges may also be employed in the central rotatingfriction disks, 23,24., 35, and 36. I have shown the disks 23, 24,provided with such anges where they-serve the same purpose as the similar {ianges' on disks 25, 27. Disks 35, i6, in the present showing, have plane outer aces.

It is obvious that many modifications and changes maybe made in the exact. construction shown and described without departing from the spirit of my invention, and I do not mean to limit myself to the specific form shown but What I claim and desire to secure by Letters Patent is 1. In a spring-retardingdevice, an attach- `ing st ud, a hardened bushing thereon, a friction diskrotatably mounted on said bushing, vfriction material iii-contact with said disk, recessed friction retaining disks adapted to receive and partially inclose said friction material and fixed against rotary movement, said. parts having a relative lateral'. movement, and adjustable means for holding said -disks on said stud, substantially as de scribed.

2. In a spring-supported vehicle, a spring retarding device comprising a central fric-' tion joint having a plurality of friction members movable relatively to each other,

arms connecting the respective members of s aid friction joint to the running gear and body portion respectively of the vehicle, a friction connection between each arm and its connected part of the vehicle, comprising a plurality of-friction members movable relatively to each other, friction material between said members and lying partly within a recess in one of said friction members, a support for said devices rigidly -attached to the body and running gear, connections for holding one of said friction members in each friction connection against rotary movement, and attaching devices for securing said as described.

3. Ina spring-supported vehicle, a spring retarding device comprising a central friction joint having a plurality of friction members movable relatively to each other, arms connecting the respective members of lsaid friction joint to the running gear and body portion respectively `of the vehicle, a friction connection between each arm and its connected part of the vehicle comprising a'plurality of friction members movable parts in position, substantially Lisa-'vea tarding device comprising a central frictiony joint having a plurality of friction members movable relatively to each other, arms connecting the respective members of-said friction joint to the running gear and body portion respectively of the vehicle, a friction connection between each arm and its con;` nected part of the vehicle, comprising a stud fixed to the connected part of the vehicle, a plurality of recessed disks fixed to said hub, friction material adapted to be received and partially inclosed in said recesses, a friction disk attached to said arm and'rotating on said hub, means whereby one of said rej" cessed disks has a lateral movement on said hub, and adjustable means on said` hubl for securing the parts therein and applying pressure'thereto, substantially as described..

5. In a spring-supported vehicle, a spring retarding device, comprising a central friction joint, having a plurality of friction members movable relatively to each other, arms connecting the respective members of 'said friction joint to the running gear and J body portion respectively of the vehicle, a

u l'e'hicle, a hardened bushing thereon, a frefriction connection between each arm and -its connected part of the vehicle, comprising ai studixed to the connected part ofthe cessed friction disk fixed to said hub against movement,a second recessed friction disk, 'a pm and slot connection between said last mentioned disk and said bushing,`wliereby said disk has a lateral* movement, but is held against rotary movement, a central friction disk rotatably mounted upon said bushing and secured to said arm, friction washers between said central disk and said recessed .disks and lying partly within said recessed disks7 'a threaded nut engaging al -thread on said stud for holding the parts 'assembled and applying pressure thereto, substantially as described,

6. In a spring-supported vehicle, a spring- 'retarding device, comprising a central friction joint having a plurality of outer ,friction. members and' an inner friction membei', means for .assembling said parts, a two-part arm, the parts thereof being respectively attached tov saidl outerfricltion members, and a one-part'arm attached to said innerjfriction member, and located permitting a i mi in position to pass between the outer arms in use, friction connections between the said arms and the runningv gear and bodyportion respectively of the vehicle, each coinprising a stud fixed to the connected partu of the vehicle, a hardened bushing thereon, a recessed friction disk fixed to said stud against movement, a 4second recessedfric` tion disk, a. pin'and slot `connection between said last-mentioned disk and said bushing `for permitting lateral movement of the disk and `preventing rotation thereof, a central friction member rotatably mounted upon said bushing 'and secured tosaid arm, the central friction --member in the connection for the'two-part arm being in two parts, the parts -being secured tothe respective armpa'rts, ,`friction washers between said central friction member and said recessed disks and lying.` partly lwithin said recessed disks, a threaded nut engaging a'thread on said stud for holding the parts assembled and applying pressure thereto, and 'a plate between the parts of the twopart central friction member for spacing the arm-parts, substantially as described.

7. In a spring-'supported vehicle, a springretarding device, comprising a central friction joint having a plurality of outer 'friction members and an inner friction member, means for assembling -said parts, a two-part arm, the parts -thereof being respectively attached to .said outer friction members, and a one-part arm attached l' to said inner friction member, and located in position to pass between the outer arms .in use, friction connections between the said arms and the'running gear and body portion respectivelyv of the vehicle, each comprising a studfixed to the connected part ofthe vehicle, a hardened bushing thereon, a recessedv 'friction disk fined to said. stud v.jagainsti movement, a second recessed friction disk,l a pin and.slot connection between said vlast-'mentioned disk-and 'said bushing for permitting lateral movement of the disk and preventing rotation thereof, a central friction member rotatably mounted upon said'bushing and secured to saidy arm, the central friction. member in the connection,

for the two-part arm being,in two parts, Vthel parts being secured 'to the` respective friction member-for spacing the arm parts,

and plates attached to androtatable with the central disk in the other central friction member, substantially as described.

8. ln aT spring retard-ing device having a Amovement resisting joint, the combination lill@ retaining members carried by each stud and a plurality of washers.interposed between the retaining members and each of said arms.

9. In a spring. retarding device having a' movement resisting joint, the combination of means for attaching the device to two relatively movable parts of a vehicle, said means comprising a stud rigidlysecured to each vehicle part and a pair .of arms connecting said joint to said studs, the outer terminals of said arms having flat surfaces and being apertured for rotary movement on said studs, non-rotatable retaining members having plane contacting surfaces carried by each' stud, and a plurality of fiat washers interposed between the retaining members and the adjacent end of the arm, and adjustable means for holding all of said parts infrictional Contact on said stud.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

`EDIARD V. HARTFORD. Witnesses:

ARTHUR Z. HOFFMAN, l ED. SHEPHERD. 

